Improvement in scrapers for washing ores



u. GROSS. Scrapers for Washing Ures. N0.l55,439, Q Patented Sept.29,1$74.

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fWGM I UNITED STATES PATENT QFFIGE.

DAVID GROSS, OF UPPER MAGUNGIE, PENNSYLVANIA.

IMPROVEMENT IN SCRAPERS FOR WASHING ORES.

Specification forming part of Letters Patent No. 155,439, dated September 29, 1874 application filed June 20, 1874.

To all whom it may concern:

Be it known that I, DAVID GROSS, of Upper Macungie, in the county of Lehigh and State of Pennsylvania, have invented a new and valuable Improvement in Scrapers for Iron-Ore Washing; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l is a perspective view of my improved scraper-blade. Fig. 2 is a top View of a blade and its base-plate. Fig. 3 is a top view of the base-plate without the blade. Figs. 4 and 5 show the blade-sections detached. Fig. 6 is a sectional view of the blade and its baseplate. Figs. 7 are views of the wedge-keys.

Similar letters of reference indicate correspondin g parts in the several figures.

This invention has relation to scraper-blades which are used on cylinders for the purpose of washing iron ores; and it consists in a sectional blade, which is composed of two separable sections united by a key, and secured removably to a base-plate, whereby the blade can be readily renewed at pleasure, as will be hereinafter explained.

In the annexed drawings, A A designate the flat base-plates, to which my improved scrapersB are removably secured, which plates are halved together at their ends, and fastened by means of bolts. Diagonally across each plate A are two ridges, d d, between which a scraper-blade, B, is applied, and secured by means of a tenon, b and a wedge key, 70. (Shown in Fig. 6.) The blade B is composed of two sections, a and b, which are secured together by means of a wedge-key, 0, so that, when either section wears out,it can be readily replaced by a new section. The section b is constructed with a tongue, b which is slightly tapered, and which has a notch or groove, 11 in its upper end, to receive a rib, a, formed across the upper end of a recess made in the blade to to receive the tongue 71 The abutting ends 0 0 of the sections a, b are inclined toward the tongue b and one of the inclined edges of this tongue I) is made concave transversely, as shown at i, Fig. 5, to receive the convex edge of the recess in section a. I thus lock the two sections rigidly together, and can renew them at pleasure.

The above-described invention is designed as an improvement on the patents granted to R. Solliday, Nos. 138,948 and 145,455.

1 claim as my invention- 1. The blade B, composed of two sections, a and b, secured together by means of the wedge-key e, for the purpose set forth.

2. The section I), having the tongue b and groove W, in combination with the blade a, having the rib a, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

DAVID GROSS.

Witnesses:

MICHAEL PRICHARD, MILTON S. RICHARDS. 

